* {
  margin: 0;
  padding: 0;
}

ul li {
  list-style: none;
}

* {
  color: greenyellow;
}

body {
  font-size: 0;
  text-align: center;
  height: 1000px;
}

.box {
  display: inline-block;
  width: 250px;
  height: 250px;
  background-color: greenyellow;
  margin: 10px 10px;
  border: 25px solid burlywood;
  padding: 25px;
}

.box > div {
  width: 0;
  height: 0;
  border: 125px solid transparent;
  border-left-color: red;
}

.right > div {
  border: 125px solid transparent;
  border-right-color: red;
}

.nose {
  width: 200px;
  height: 100px;
  background-color: sandybrown;
  margin: 0 auto;
}

.mouth {
  transition: 1s;
  box-sizing: border-box;
  width: 500px;
  height: 250px;
  background-color: tomato;
  padding: 20px;
  margin: 0 auto;
  margin-top: 50px;
}

.mouth > div {
  width: 100%;
  height: 100%;
  background-color: violet;
}

.mouth > div > div {
  margin: 0 auto;
  width: 0;
  height: 0;
}

.mouth:hover {
  width: 550px;
  height: 300px;
}
